US20080289912A1 - Sheave for Use in an Elevator System - Google Patents

Sheave for Use in an Elevator System Download PDF

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Publication number
US20080289912A1
US20080289912A1 US12/096,797 US9679708A US2008289912A1 US 20080289912 A1 US20080289912 A1 US 20080289912A1 US 9679708 A US9679708 A US 9679708A US 2008289912 A1 US2008289912 A1 US 2008289912A1
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US
United States
Prior art keywords
coating
sheave
load bearing
bearing member
elevator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/096,797
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English (en)
Inventor
William C. Perron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Otis Elevator Co filed Critical Otis Elevator Co
Assigned to OTIS ELEVATOR COMPANY reassignment OTIS ELEVATOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PERRON, WILLIAM C.
Publication of US20080289912A1 publication Critical patent/US20080289912A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B15/00—Main component parts of mining-hoist winding devices
    • B66B15/02—Rope or cable carriers
    • B66B15/04—Friction sheaves; "Koepe" pulleys

Definitions

  • This invention generally relates to elevator systems. More particularly, this invention relates to sheaves for use in elevator systems.
  • Elevator systems come in a variety of forms.
  • Some traction-driven elevator systems include a load bearing member such as a rope or belt that supports the weight of an elevator car and a counterweight.
  • a traction sheave propels the load bearing member to cause desired movement of the elevator car.
  • Traditional arrangements rely upon sufficient traction between the traction sheave and the load bearing member to achieve the desired movement and to be able to hold the elevator car in a stationary position by applying a brake to the traction sheave, for example.
  • Many elevator systems also include one or more idler or deflection sheaves for guiding the load bearing member in a desired pattern.
  • such sheaves have been made from metal.
  • polymer sheaves have been introduced.
  • Various materials have been used as coatings on idler sheaves to achieve desired characteristics. For example, electroless nickel platings have been used to achieve a desired hardness and to control a profile or contour of the sheave.
  • noise results from relative speed differences between belts within a group of belts used as the load bearing assembly.
  • the speed differences occur when there is a difference in sheave diameter between the sheaves guiding corresponding ones of the belts.
  • many sheaves have a crown surface which has a varying diameter across a groove or surface upon which the load bearing member rides. These differences in diameter can introduce varying belt speeds between belts or, in some cases, between portions of a belt following the sheave surface.
  • An exemplary sheave for use in an elevator system includes a surface adapted for contacting an elevator load bearing member. That surface has an at least partially metallic coating comprising a component that has a friction reducing property.
  • the component comprises a fluoropolymer. The presence of the fluoropolymer reduces friction between the load bearing member and the sheave surface.
  • the coating comprises electroless nickel and polytetrafluoroethylene.
  • the coating has a thickness between about 0.025 mm (0.001 inch) and about 0.035 mm (0.0015 inch).
  • An example method includes coating a sheave with an at least partially metallic coating selected for establishing a desired coefficient of friction between the sheave and a load bearing member.
  • FIG. 1 schematically shows selected portions of an elevator system including at least one idler sheave designed according to an embodiment of this invention.
  • FIG. 2 is a perspective, diagrammatic illustration of an example idler sheave.
  • FIG. 1 schematically shows an elevator system 20 including an elevator car 22 and counterweight 24 .
  • Load bearing members 26 support the weight of the car 22 and the counterweight 24 in a known manner.
  • the load bearing members 26 comprises a plurality of flat belts. This invention is not necessarily limited to any particular roping arrangement nor any particular load bearing member configuration.
  • a traction sheave 28 propels the load bearing members 26 to cause desired movement of the elevator car 22 and counterweight 24 responsive to operation of a machine 30 in a known manner.
  • the illustrated example includes a plurality of deflector or idler sheaves 32 and 34 associated with the elevator car 22 .
  • Another idler sheave 36 is associated with the counterweight 24 .
  • idler sheaves guide or direct the load bearing members 26 in a selected pattern or direction as the load bearing members 26 move responsive to movement of the traction sheave 28 .
  • One aspect of the disclosed example is that it introduces a low friction surface on the idler sheaves without introducing the possibility for compromising the necessary friction or traction between the traction sheave 28 and the load bearing member 26 .
  • the idler sheaves 32 , 34 and 36 essentially guide or direct the load bearing member 26 without requiring traction between those sheaves and the load bearing member to achieve desired elevator system operation.
  • FIG. 2 shows an example idler sheave 36 that includes a plurality of load bearing member contacting surfaces 40 , which are each associated with one of the load bearing members 26 .
  • the load bearing member contacting surfaces 40 generally comprise grooves on the sheave 36 .
  • the load bearing member contacting surfaces 40 are crowned so that the diameter across the surface within each groove varies with a peak near a center of the groove.
  • the example idler sheave 36 includes a coating on the load bearing member contacting surfaces 40 . Selecting the material composition of the coating allows for establishing a desired coefficient of friction between the contacting surface 40 and a corresponding load bearing member 26 .
  • One example coating is at least partially metallic and comprises a fluoropolymer.
  • the coating comprises polytetrafluoroethylene (i.e., Teflon®).
  • Teflon® polytetrafluoroethylene
  • Other fluoropolymers such as polyvinylidene difluoride or perfluoroalkoxy are used in other examples.
  • the presence of the fluoropolymer reduces friction between the load bearing members 26 and the surfaces 40 on the sheave 36 in some examples. Reducing friction reduces or eliminates relative speed differences between individual load bearing members 26 (e.g., belts), which has the advantage of reducing noise in the elevator system 20 .
  • the coating on the surface 40 can reduce relative speed differences between portions of the belt, which might otherwise occur because of the differences in sheave diameter across the portion of the surface 40 contacting the load bearing member.
  • One particular example coating comprises a commercially available electroless nickel-Teflon plating.
  • Known electroless plating techniques are used to apply the coating to each surface 40 in one example.
  • an electroless nickel plating was only used to control the contour on the sheave.
  • material selection allows for (or is based upon a desire for) establishing a desired coefficient of friction between an idler sheave and a load bearing member.
  • One example includes selecting a metallic coating.
  • Another example includes selecting a coating that includes at least one component that has a friction reducing property.
  • Example components of this type include fluoropolymers.
  • One example includes a coating having a thickness in a range from about 0.020 mm to about 0.050 mm.
  • One example includes a coating thickness in a range between about 0.025 mm (0.001 inch) and about 0.035 mm (0.0015 inch). Controlling the thickness of the coating allows for controlling the exterior geometry of the sheave load bearing member contacting surface 40 in a manner that will not introduce a potential for noise. In other words, one example includes controlling the thickness of the coating to avoid distorting the surface 40 on the idler sheave away from the intended design of the sheave contacting surface 40 .

Landscapes

  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Pulleys (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
US12/096,797 2005-12-28 2005-12-28 Sheave for Use in an Elevator System Abandoned US20080289912A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2005/047062 WO2007075163A1 (en) 2005-12-28 2005-12-28 Sheave for use in an elevator system

Publications (1)

Publication Number Publication Date
US20080289912A1 true US20080289912A1 (en) 2008-11-27

Family

ID=38218295

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/096,797 Abandoned US20080289912A1 (en) 2005-12-28 2005-12-28 Sheave for Use in an Elevator System

Country Status (7)

Country Link
US (1) US20080289912A1 (pt)
EP (1) EP1968878B1 (pt)
JP (1) JP2009522186A (pt)
CN (1) CN101365643A (pt)
BR (1) BRPI0520808B1 (pt)
ES (1) ES2397167T3 (pt)
WO (1) WO2007075163A1 (pt)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110259676A1 (en) * 2008-12-23 2011-10-27 Otis Elevator Company Wear and friction control of metal rope and sheave interfaces
US20120037460A1 (en) * 2009-01-22 2012-02-16 Inventio Ag Drive pulley for an elevator installation
WO2012099604A1 (en) * 2011-01-21 2012-07-26 Otis Elevator Company System and method for reducing belt noise
WO2013172824A1 (en) * 2012-05-16 2013-11-21 Otis Elevator Company Coated sheave
WO2015076822A1 (en) * 2013-11-22 2015-05-28 Otis Elevator Company Idler or deflector sheave for elevator system
US20150329319A1 (en) * 2014-05-19 2015-11-19 Kone Corporation Elevator
WO2017140635A1 (en) * 2016-02-16 2017-08-24 Inventio Ag Pulley for an elevator with a friction reducing coating and method for manufacturing same
US10029887B2 (en) 2016-03-29 2018-07-24 Otis Elevator Company Electroless metal coating of load bearing member for elevator system
WO2019238236A1 (en) * 2018-06-14 2019-12-19 Applied Materials, Inc. Roller device for guiding a flexible substrate, use of a roller device for transporting a flexible substrate, vacuum processing apparatus, and method of processing a flexible substrate
US10822202B2 (en) 2017-08-08 2020-11-03 Otis Elevator Company Unitized segmented sheave assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013165438A1 (en) * 2012-05-04 2013-11-07 Otis Elevator Company Methods and apparatuses for applying a substrate onto an elevator sheave
CN104302569B (zh) * 2012-05-16 2017-10-13 奥的斯电梯公司 用于电梯系统的滑轮
CN103171946B (zh) * 2013-03-08 2015-05-06 宁波谷达机电有限公司 电梯导向轮组件及其调节方法
EP3174820B1 (en) 2014-07-31 2020-09-02 Otis Elevator Company Sheave for elevator system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279762A (en) * 1964-03-11 1966-10-18 Otis Elevator Co Noise abating and traction improving elevator sheave
US5985029A (en) * 1996-11-08 1999-11-16 Speedline Technologies, Inc. Conveyor system with lifting mechanism
US20030075389A1 (en) * 1998-03-12 2003-04-24 Kabushiki Kaisha Toshiba Traction elevator
US20040016602A1 (en) * 2000-12-08 2004-01-29 Esko Aulanko Elevator
US20040256180A1 (en) * 2003-06-19 2004-12-23 Roland Eichhorn Elevator for transporting a load by means of a movable traction means

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56109449A (en) * 1980-02-05 1981-08-29 Mitsubishi Electric Corp Metal vapor discharge lamp
JP3513378B2 (ja) * 1997-11-27 2004-03-31 大日本スクリーン製造株式会社 基板処理装置
AU2003269802A1 (en) * 2002-03-14 2003-12-31 Shamrock Technologies, Inc. Methods for producing submicron polytetrafluoroethylene powder and products thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279762A (en) * 1964-03-11 1966-10-18 Otis Elevator Co Noise abating and traction improving elevator sheave
US5985029A (en) * 1996-11-08 1999-11-16 Speedline Technologies, Inc. Conveyor system with lifting mechanism
US20030075389A1 (en) * 1998-03-12 2003-04-24 Kabushiki Kaisha Toshiba Traction elevator
US20040016602A1 (en) * 2000-12-08 2004-01-29 Esko Aulanko Elevator
US20040256180A1 (en) * 2003-06-19 2004-12-23 Roland Eichhorn Elevator for transporting a load by means of a movable traction means

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110259676A1 (en) * 2008-12-23 2011-10-27 Otis Elevator Company Wear and friction control of metal rope and sheave interfaces
US20120037460A1 (en) * 2009-01-22 2012-02-16 Inventio Ag Drive pulley for an elevator installation
WO2012099604A1 (en) * 2011-01-21 2012-07-26 Otis Elevator Company System and method for reducing belt noise
US20130292211A1 (en) * 2011-01-21 2013-11-07 David R. Polak System And Method For Reducing Belt Noise
US10336581B2 (en) * 2011-01-21 2019-07-02 Otis Elevator Company System and method for reducing belt noise
RU2596043C9 (ru) * 2011-01-21 2016-12-20 Отис Элевэйтор Компани Система и способ уменьшения шума от ремня
US9815667B2 (en) 2012-05-16 2017-11-14 Otis Elevator Company Coated sheave
WO2013172824A1 (en) * 2012-05-16 2013-11-21 Otis Elevator Company Coated sheave
EP2850027A4 (en) * 2012-05-16 2016-06-15 Otis Elevator Co PUMPS WITH COATED THROAT
WO2015076822A1 (en) * 2013-11-22 2015-05-28 Otis Elevator Company Idler or deflector sheave for elevator system
US10294079B2 (en) 2013-11-22 2019-05-21 Otis Elevator Company Idler or deflector sheave for elevator system
US9771244B2 (en) * 2014-05-19 2017-09-26 Kone Corporation Elevator
US20150329319A1 (en) * 2014-05-19 2015-11-19 Kone Corporation Elevator
WO2017140635A1 (en) * 2016-02-16 2017-08-24 Inventio Ag Pulley for an elevator with a friction reducing coating and method for manufacturing same
CN108698800A (zh) * 2016-02-16 2018-10-23 因温特奥股份公司 用于电梯的具有减摩涂层的滑轮及其制造方法
US11174130B2 (en) * 2016-02-16 2021-11-16 Inventio Ag Pulley for an elevator with a friction reducing coating and method for manufacturing same
US10029887B2 (en) 2016-03-29 2018-07-24 Otis Elevator Company Electroless metal coating of load bearing member for elevator system
US10822202B2 (en) 2017-08-08 2020-11-03 Otis Elevator Company Unitized segmented sheave assembly
WO2019238236A1 (en) * 2018-06-14 2019-12-19 Applied Materials, Inc. Roller device for guiding a flexible substrate, use of a roller device for transporting a flexible substrate, vacuum processing apparatus, and method of processing a flexible substrate
CN112334596A (zh) * 2018-06-14 2021-02-05 应用材料公司 用于导引柔性基板的滚轴装置、用于传送柔性基板的滚轴装置的用途、真空处理设备及处理柔性基板的方法
KR20210020110A (ko) * 2018-06-14 2021-02-23 어플라이드 머티어리얼스, 인코포레이티드 가요성 기판을 가이딩하기 위한 롤러 디바이스, 가요성 기판을 운송하기 위한 롤러 디바이스의 사용, 진공 프로세싱 장치, 및 가요성 기판을 프로세싱하는 방법
KR102480828B1 (ko) 2018-06-14 2022-12-23 어플라이드 머티어리얼스, 인코포레이티드 가요성 기판을 가이딩하기 위한 롤러 디바이스, 가요성 기판을 운송하기 위한 롤러 디바이스의 사용, 진공 프로세싱 장치, 및 가요성 기판을 프로세싱하는 방법

Also Published As

Publication number Publication date
BRPI0520808B1 (pt) 2018-02-14
EP1968878A1 (en) 2008-09-17
EP1968878B1 (en) 2012-10-10
JP2009522186A (ja) 2009-06-11
ES2397167T3 (es) 2013-03-05
BRPI0520808A2 (pt) 2009-11-03
CN101365643A (zh) 2009-02-11
WO2007075163A1 (en) 2007-07-05
EP1968878A4 (en) 2011-08-17

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Legal Events

Date Code Title Description
AS Assignment

Owner name: OTIS ELEVATOR COMPANY, CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PERRON, WILLIAM C.;REEL/FRAME:021069/0447

Effective date: 20051220

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION